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Effect of Pt nanoparticle size on the specific catalytic activity of Pt/SiO2 and Pt/TiO2 in the total oxidation of methane and n-butane

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Abstract

The dependence of the specific catalytic activity (A sp ) of the catalysts Pt/SiO2 and Pt/TiO2 in the total oxidation of CH4 and n-C4H10 on the Pt nanoparticle size (in the range from 1 to 4 nm) was studied. The specific catalytic activity increases with an increase in the platinum nanoparticle size, indicating that the total oxidation is a structure-sensitive reaction. The structure sensitivity depends on the size of an oxidized molecule: it increases sharply on going from CH4 to n-C4H10. The support also exerts a considerable effect on the A sp value: in the oxidation of both CH4 and C4H10 the specific catalytic activity for the catalysts Pt/TiO2 is 3–4 times that for Pt/SiO2.

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Correspondence to A. Yu. Stakheev.

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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1667–1673, September, 2010.

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Stakheev, A.Y., Gololobov, A.M., Beck, I.E. et al. Effect of Pt nanoparticle size on the specific catalytic activity of Pt/SiO2 and Pt/TiO2 in the total oxidation of methane and n-butane. Russ Chem Bull 59, 1713–1719 (2010). https://doi.org/10.1007/s11172-010-0301-2

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  • DOI: https://doi.org/10.1007/s11172-010-0301-2

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